Energy-saving ventilation duct device

Abstract

The present application discloses an energy-saving ventilation duct device, comprising a connecting frame, wherein a filter screen is fixedly installed inside the connecting frame, connecting bolts are sleeved on the top of the connecting frame near the two sides, and the connecting bolts are connected to the first installation groove, and side sliding plates and a matching tail plate are fixedly installed on both sides and the end of the connecting seat respectively, and a fastening bolt is sleeved on the top of the matching tail plate, and a bottom plate is fixedly installed on the bottom of the connecting seat near the front end, and a second rotating hole is opened at the bottom of the bottom plate. When a large amount of dust adheres to the surface of the filter screen, the wind resistance of the filter screen becomes higher, and the rotating device moves toward the side away from the air inlet, and the seat is disengaged from the ratchet to contact the locked state, and the airflow passes through the gap between the left side of the inner wall of the air inlet and the rotating device, and acts on the surface of the driving fan blade, pushing the rotating device to rotate as a whole, thereby realizing the automatic replacement function of the filter screen.

Description

Technical Field

[0001] The present application relates to the technical field of building ventilation, and in particular to an energy-saving ventilation duct device. Background Art

[0002] In large buildings, centralized air supply is used to purify the indoor air. With the iteration of technology, the existing ventilation structure is more energy-efficient, and its appearance is more in line with the artistic requirements of modern architecture and does not appear abrupt. In order to ensure the cleanliness of the air entering the building, a dust filter is installed inside the ventilation structure. This type of energy-saving ventilation duct device has the advantages of simple structure, easy use, and low cost. It is currently the most widely used ventilation structure.

[0003] Although the existing ventilation structure has many of the above-mentioned advantages, it still has certain limitations in actual use. The dust filter in the ventilation structure is often directly fixed to the main body. With long-term use, the dust attached to the surface of the dust filter will cause blockage, resulting in obstruction of gas circulation, reduced indoor air circulation efficiency, and poor air quality inside the building, affecting people's physical and mental health. In addition, when maintenance personnel clean the dust filter, the operation is more inconvenient and even requires shutdown for maintenance. In this regard, the present application document proposes an energy-saving ventilation duct device to solve the above-mentioned problems. Summary of the invention

[0004] The present application proposes an energy-saving ventilation duct device, which has the advantages of automatically replacing and cleaning the filter, and is used to solve the problem that traditional equipment requires manual cleaning of the filter.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an energy-saving ventilation duct device, comprising a rotating bin, wherein the front and rear sides of the outer surface of the rotating bin are respectively provided with an air inlet and an air supply duct, the interior of the rotating bin is movably equipped with a rotating device, travel bins are provided at the top and bottom of the rotating bin, limited bins are provided on both sides of the outer surface of the travel bin, a limited sliding bar is fixedly installed at one end of the inner wall of the limited bin, the limited sliding bar cooperates with the rotating device, a holder is fixedly installed on the front side of the inner wall of the travel bin, a side air outlet is provided on the right side of the outer surface of the rotating bin near the air inlet, a side air duct is provided on the left side of the outer surface of the rotating bin near the air supply duct, a dust collection device is fixedly installed on one end of the side air duct, one side of the dust collection device is connected to the air supply duct through a pipe, and a flow blocking device is provided on the front side of the air supply duct near the dust collection device.

[0006] Furthermore, the right side of the inner wall of the air inlet is in contact with the rotating device, and there is a gap between the left side of the inner wall of the air inlet and the rotating device, so that the rotating device can move back and forth inside the air inlet.

[0007] Further, the rotating device includes a rotating drum, a first mounting groove is provided on the outer surface of the rotating drum, a filtering device is fixedly installed inside the first mounting groove, a strip groove is provided on the outer surface of the rotating drum at a position between the first mounting grooves, a first rotating hole is provided at the bottom of the strip groove, a driving device is provided in the internal movable sleeve of the first rotating hole, a second mounting groove is provided on the top of the rotating drum and above the strip groove, matching grooves are provided on both sides of the inner wall and the end of the second mounting groove, a connecting device is fixedly installed inside the second mounting groove, and a fastening hole is provided at the top of the rotating drum near the second mounting groove.

[0008] Furthermore, the number of the first installation slots, the strip slots and the second installation slots are all eight, and are distributed in a ring array.

[0009] Furthermore, ratchets are fixedly installed at the center of the top and bottom of the rotating drum, a bearing seat is fixedly installed at one end of the ratchet, a travel seat is movably mounted on the outer surface of the bearing seat through a bearing connection, sliding seats are fixedly installed on both sides of the outer surface of the travel seat, and the travel seat is movably installed inside the travel bin.

[0010] Furthermore, the sliding seat cooperates with the limiting sliding rod, one end of the sliding seat is connected to the inner wall of the limiting bin through a spring, and the ratchet is in contact and engaged with the clamping seat in the initial state.

[0011] Furthermore, the filtering device comprises a connecting frame, a filter screen is fixedly installed inside the connecting frame, connecting bolts are sleeved on the top of the connecting frame near the two sides, and the connecting bolts are connected to the first installation grooves.

[0012] Specifically, the driving device includes a driving blade, and a connecting shaft is fixedly installed on the top and bottom of the driving blade. A torsion spring is clamped on the outer surface of the connecting shaft, and one end of the torsion spring at the bottom of the driving blade is connected to the first rotating hole.

[0013] Specifically, the connecting device includes a connecting seat, and side sliding plates and matching tail plates are fixedly installed on both sides and the end of the connecting seat respectively. The top of the matching tail plate is provided with a fastening bolt, and the fastening bolt is also matched with the fastening hole. A bottom plate is fixedly installed at a position near the front end of the bottom of the connecting seat, and a second rotating hole is opened at the bottom of the bottom plate, and the second rotating hole is connected to one end of the torsion spring at the bottom of the driving fan blade.

[0014] Furthermore, the elastic force of the torsion spring in the initial state will drive the fan blades to rotate to the unfolded state.

[0015] Furthermore, the dust collection device includes a dust box, side connecting holes are opened on both sides of the dust box, a connecting pipe is fixedly installed at a position corresponding to the side connecting hole on one side of the dust box, the side air duct is fixedly connected to the side connecting hole on one side, one end of the connecting pipe is connected to the air supply duct, and a hand-pull dust collection plate is movably installed at the bottom of the dust box.

[0016] Furthermore, the flow blocking device comprises a power machine, a rotating shaft is fixedly mounted on the output end of the power machine, a flow blocking plate is fixedly sleeved on the outer surface of the rotating shaft, and a flow blocking block is fixedly mounted on one side of the flow blocking plate.

[0017] Specifically, the baffle blocks the connection between the connecting pipe and the air supply pipe in the initial state, and the baffle blocks the inside of the air supply pipe after the power machine drives the rotating shaft to rotate 90 degrees.

[0018] This application has the following beneficial effects.

[0019] The device can more conveniently disassemble the strip groove and the driving device, reducing the difficulty of maintenance, and the filtering device can filter the dust in the air twice, improving the cleanliness of the air entering the building. At the same time, when the front of the filter is blocked by dust, the filter can be automatically replaced with the rotation of the rotating device as a whole. In addition, when the power machine drives the baffle to rotate and blocks the internal pipe of the air supply duct, the gas can flow through the side air outlet and the side air duct, and in the process, the dust attached to the surface of the filter can be cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0021] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a cross-sectional view of the structure of the present invention;

[0024] Figure 3 This is a structural diagram of the air duct of the present invention;

[0025] Figure 4 It is a front view of the air duct structure of the present invention;

[0026] Figure 5 The structure of the present invention Figure 4Sectional view in the A direction;

[0027] Figure 6 The structure of the present invention Figure 4 Cross-section along the middle B direction;

[0028] Figure 7 This is a diagram of the structural rotating device of the present invention;

[0029] Figure 8 This is a main body diagram of the structural rotating device of the present invention;

[0030] Fig. 9 This is a diagram of the structural filtering device of the present invention;

[0031] Fig.10 This is a diagram of the structural driving device of the present invention;

[0032] Fig.11 This is a diagram of the structural connection device of the present invention;

[0033] Fig.12 It is a right side view of the structural connection device of the present invention;

[0034] Fig.13 This is a diagram of a dust collection device of the present invention;

[0035] Fig.14 It is a cross-sectional view of the dust collection device of the present invention;

[0036] Fig.15 It is a schematic diagram of the structural flow-blocking device of the present invention.

[0037] In the figure; 1, rotating bin; 2, air inlet; 3, air supply pipe; 4, rotating device; 41, rotating drum; 42, first mounting groove; 43, filtering device; 431, connecting frame; 432, filtering net; 433, connecting bolt; 44, strip groove; 45, first rotating hole; 46, driving device; 461, driving blade; 462, connecting shaft; 463, torsion spring; 47, second mounting groove; 48, matching groove; 49, connecting device; 491, connecting seat; 492, side slide plate; 493, matching tail plate; 494, Fastening bolt; 495, bottom plate; 496, second rotating hole; 401, fastening hole; 402, ratchet; 403, bearing seat; 404, travel seat; 405, sliding seat; 5, travel bin; 6, limit bin; 7, limit slide bar; 8, holder; 9, side air outlet; 10, side air duct; 11, dust collection device; 111, dust collection box; 112, side connecting hole; 113, connecting pipe; 114, hand-pull dust collection plate; 12, flow blocking device; 121, power machine; 122, rotating shaft; 123, flow blocking plate; 124, flow blocking block. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] An energy-saving ventilation duct device, see Figure 1-Figure 6 , comprises a rotating bin 1, an air inlet 2 and an air supply pipe 3 are respectively arranged on the front and rear sides of the outer surface of the rotating bin 1, a rotating device 4 is movably installed inside the rotating bin 1, a travel bin 5 is arranged at the top and bottom of the rotating bin 1, limited bins 6 are arranged on both sides of the outer surface of the travel bin 5, a limited slide bar 7 is fixedly installed at one end of the inner wall of the limited bin 6, the limited slide bar 7 cooperates with the rotating device 4, a holder 8 is fixedly installed on the front side of the inner wall of the travel bin 5, a side air outlet 9 is arranged on the right side of the outer surface of the rotating bin 1 near the air inlet 2, a side air duct 10 is arranged on the left side of the outer surface of the rotating bin 1 near the air supply pipe 3, a dust accumulation device 11 is fixedly installed at one end of the side air duct 10, one side of the dust accumulation device 11 is connected to the air supply pipe 3 through a pipeline, and a flow blocking device 12 is arranged on the front of the air supply pipe 3 near the dust accumulation device 11.

[0040] See also Figure 2 The right side of the inner wall of the air inlet 2 fits with the rotating device 4 , and there is a gap between the left side of the inner wall of the air inlet 2 and the rotating device 4 , so that the rotating device 4 can move back and forth inside the air inlet 2 .

[0041] See also Figure 1 and Figure 7-Figure 8 The rotating device 4 includes a rotating drum 41, a first mounting groove 42 is provided on the outer surface of the rotating drum 41, a filtering device 43 is fixedly installed inside the first mounting groove 42, a strip groove 44 is provided on the outer surface of the rotating drum 41 at a position between the first mounting grooves 42, a first rotating hole 45 is provided at the bottom of the strip groove 44, a driving device 46 is movably sleeved inside the first rotating hole 45, a second mounting groove 47 is provided on the top of the rotating drum 41 and above the strip groove 44, matching grooves 48 are provided on both sides and the end of the inner wall of the second mounting groove 47, a connecting device 49 is fixedly installed inside the second mounting groove 47, a fastening hole 401 is provided on the top of the rotating drum 41 near the second mounting groove 47, when the gas enters the air supply pipe 3 through the air inlet 2, it will pass through the rotating device 4, and in the process of passing through, it will pass through the filtering device 43 twice, so that the gas will be filtered twice, further remove dust in the air, ensure that the air entering the building can be cleaner, and improve the reliability of the device.

[0042] See also Figure 7-Figure 8 The number of the first mounting grooves 42 , the strip grooves 44 , and the second mounting grooves 47 are all eight, and they are distributed in a circular array.

[0043] See also Figure 9-12 A ratchet 402 is fixedly installed at the center of the top and bottom of the rotating drum 41, a bearing seat 403 is fixedly installed at one end of the ratchet 402, a travel seat 404 is movably sleeved on the outer surface of the bearing seat 403 by a bearing connection, sliding seats 405 are fixedly installed on both sides of the outer surface of the travel seat 404, and the travel seat 404 is movably installed inside the travel bin 5.

[0044] See also Figure 6 and Figure 8 The sliding seat 405 cooperates with the limiting slide rod 7, one end of the sliding seat 405 is connected to the inner wall of the limiting bin 6 through a spring, and the ratchet 402 is in contact and engaged with the clamping seat 8 in the initial state.

[0045] See also Figure 8-Figure 9 The filter device 43 includes a connecting frame 431 , a filter screen 432 is fixedly installed inside the connecting frame 431 , and connecting bolts 433 are sleeved on the top of the connecting frame 431 near both sides, and the connecting bolts 433 are connected to the first installation groove 42 .

[0046] See also Figure 1 and Figure 6-Figure 10The driving device 46 includes a driving blade 461, and a connecting shaft 462 is fixedly installed on the top and bottom of the driving blade 461. A torsion spring 463 is clamped on the outer surface of the connecting shaft 462, and one end of the torsion spring 463 at the bottom of the driving blade 461 is connected to the first rotating hole 45. After the device has been used for a period of time, a large amount of debris will be attached to the surface of the filter screen 432 in the filter device 43 which is in the corresponding position with the air inlet 2 and the air supply pipe 3. At this time, the wind resistance of the filter screen 432 becomes higher, causing the rotating device 4 to move toward the side away from the air inlet 2 under the action of air pressure, and the holder 8 is disengaged from the ratchet 402 to contact the locked state. At this time, the right side of the inner wall of the air inlet 2 is in contact with the rotating device 4, and there is a gap between the left side of the inner wall of the air inlet 2 and the rotating device 4, and the wind resistance of the filter screen 432 becomes higher, so that the airflow passes through the gap between the left side of the inner wall of the air inlet 2 and the rotating device 4. However, due to the elastic force of the torsion spring 463 in the initial state, the fan blade 461 is driven to the expanded state, and the airflow acts on the surface of the driving fan blade 461, pushing the rotating device 4 to rotate as a whole, and the filter screen 432 in the blocked state rotates to the right side, and the filter screen 432 on the right side and in the clean state rotates to a state corresponding to the air inlet 2, thereby realizing the automatic replacement function of the filter screen 432, avoiding the problem of reduced air intake volume due to the filter screen 432 being in a blocked state, and no manual maintenance and replacement of the filter screen 432 is required, thereby improving the reliability of the device. In addition, after the replacement of the filter screen 432 is completed, the wind resistance of the filter screen 432 becomes smaller, and the rotating device 4 is reset as a whole. The socket 8 is engaged with the ratchet 402 here to prevent the rotating device 4 from rotating again as a whole, and the driving device 46 in the expanded state will block the gas from flowing through the gap on one side of the rotating device 4.

[0047] See also Figure 7 - Fig.12 The connecting device 49 includes a connecting seat 491, and side slide plates 492 and matching tail plates 493 are fixedly installed on both sides and the end of the connecting seat 491 respectively. A fastening bolt 494 is sleeved on the top of the matching tail plate 493, and the fastening bolt 494 is matched with the fastening hole 401 at the same time. A bottom plate 495 is fixedly installed at a position near the front end of the bottom of the connecting seat 491. A second rotating hole 496 is opened at the bottom of the bottom plate 495, and the second rotating hole 496 is connected to one end of the torsion spring 463 at the bottom of the driving fan blade 461. The strip groove 44 is fixed to the inside of the first mounting groove 42 by a connecting bolt 433. It is only necessary to release the connection between the connecting bolt 433 and the first mounting groove 42 to disassemble the filter device 43 as a whole. At the same time, the connection between the fastening bolt 494 and the fastening hole 401 is released, so that the connecting device 49 can be pulled out from the inside of the matching groove 48. At this time, the driving device 46 can be directly pulled out. The entire disassembly process is relatively convenient, which makes the device less difficult to disassemble and maintain, thereby improving the practicality of the device.

[0048] See also Fig.10 The elastic force of the torsion spring 463 in the initial state will drive the fan blade 461 to rotate to the unfolded state.

[0049] See also Figure 5 and Figure 13-14 The dust collection device 11 includes a dust box 111, and side connecting holes 112 are opened on both sides of the dust box 111. A connecting pipe 113 is fixedly installed at a position corresponding to the side connecting hole 112 on one side of the dust box 111. The side air duct 10 is fixedly connected to the side connecting hole 112 on one side, and one end of the connecting pipe 113 is connected to the air supply duct 3. A hand-pull dust collection plate 114 is movably installed at the bottom of the dust box 111.

[0050] See also Figure 1 , Fig. 9 and Fig.15 The flow blocking device 12 includes a power machine 121 , a rotating shaft 122 is fixedly mounted on the output end of the power machine 121 , a flow blocking plate 123 is fixedly sleeved on the outer surface of the rotating shaft 122 , and a flow blocking block 124 is fixedly mounted on one side of the flow blocking plate 123 .

[0051] In the initial state, the baffle block 124 blocks the connection between the connecting pipe 113 and the air supply pipe 3. After the power machine 121 drives the rotating shaft 122 to rotate ninety degrees, the baffle plate 123 blocks the inside of the air supply pipe 3. When the filter screen 432 with dust attached to the surface is continuously rotated by the rotating device 4, it moves to the position corresponding to the side air duct 10. At this time, the power machine 121 drives the rotating shaft 122 to rotate, so that the baffle plate 123 blocks the inside of the air supply pipe 3. At this time, the gas can only circulate through the side air port 9 and the side air duct 10. When the airflow passes through the filter screen 432, the dust attached to the surface of the filter screen 432 can be blown away, and the blown away dust is attached to the hand-pull dust collection plate 114 through the side air duct 10. Manual work only needs to replace the hand-pull dust collection plate 114 regularly, which makes the device more convenient to maintain, further improving the practicality of the device.

[0052] The method of use of the present invention is as follows:

[0053] During use, when the ventilation equipment in the building is turned on, the airflow enters the air supply pipe 3 through the air inlet 2, and passes through the filter device 43 twice during the process, so that the gas will be filtered twice, further removing dust in the air, and ensuring that the air entering the building can be cleaner. After the device has been used for a period of time, a large amount of debris will be attached to the surface of the filter 432 in the filter device 43 at the corresponding position with the air inlet 2 and the air supply pipe 3. At this time, the wind resistance of the filter 432 becomes higher, causing the rotating device 4 to move toward the side away from the air inlet 2 under the action of air pressure, and the holder 8 is disengaged from the ratchet 402 to contact the locked state. At this time, the right side of the inner wall of the air inlet 2 is in contact with the rotating device 4, and there is a gap between the left side of the inner wall of the air inlet 2 and the rotating device 4, and the wind resistance of the filter 432 becomes higher, so that the airflow passes through the gap between the left side of the inner wall of the air inlet 2 and the rotating device 4. Due to the elastic force of the torsion spring 463 in the initial state, the fan blade 461 is driven to rotate to the unfolded state, and the airflow acts on the driving fan blade 461 surface, push the rotating device 4 to rotate as a whole, the filter screen 432 in the blocked state rotates to the right, and the filter screen 432 on the right and in the clean state rotates to a state corresponding to the air inlet 2, realizing the automatic replacement function of the filter screen 432, and no longer needing to manually maintain and replace the filter screen 432. After the replacement of the filter screen 432 is completed, the wind resistance of the filter screen 432 becomes smaller, the rotating device 4 is reset as a whole, and the holder 8 is engaged with the ratchet 402 here. When the filter screen 4 with dust attached to the surface is 32 As the rotating device 4 continues to rotate, it moves to a position corresponding to the side air duct 10. At this time, the power machine 121 drives the rotating shaft 122 to rotate, so that the baffle 123 blocks the inside of the air supply duct 3. At this time, the gas can only circulate through the side air port 9 and the side air duct 10. When the air flow passes through the filter 432, the dust attached to the surface of the filter 432 can be blown away, and the blown dust is attached to the hand-pull dust collection plate 114 through the side air duct 10. Manual work only needs to regularly replace the hand-pull dust collection plate 114.

Claims

1. An energy-saving ventilation duct device, characterized in that: The invention comprises a rotating bin (1), wherein the front side and the rear side of the outer surface of the rotating bin (1) are respectively provided with an air inlet (2) and an air supply pipe (3), a rotating device (4) is movably installed inside the rotating bin (1), a travel bin (5) is arranged at the top and the bottom of the rotating bin (1), and limit bins (6) are arranged on both sides of the outer surface of the travel bin (5), a limit slide bar (7) is fixedly installed on one end of the inner wall of the limit bin (6), and the limit slide bar (7) cooperates with the rotating device (4), and the front side of the inner wall of the travel bin (5) is fixedly installed A holder (8) is provided, a side air outlet (9) is provided on the right side of the outer surface of the rotating bin (1) near the air inlet (2), a side air duct (10) is provided on the left side of the outer surface of the rotating bin (1) near the air supply duct (3), a dust collection device (11) is fixedly installed at one end of the side air duct (10), one side of the dust collection device (11) is connected to the air supply duct (3) through a pipeline, and a flow blocking device (12) is provided on the front side of the air supply duct (3) near the dust collection device (11); the right side of the inner wall of the air inlet (2) is connected to the rotating device The rotating device (4) is fitted with the air inlet (2), a gap exists between the left side of the inner wall of the air inlet (2) and the rotating device (4), and the rotating device (4) can move forward and backward inside the air inlet (2); the rotating device (4) comprises a rotating drum (41), the outer surface of the rotating drum (41) is provided with a first installation groove (42), a filter device (43) is fixedly installed inside the first installation groove (42), and the outer surface of the rotating drum (41) is provided with a strip groove (44) at a position between the first installation grooves (42), and the strip groove ( A first rotating hole (45) is provided at the bottom of the rotating roller (44), a driving device (46) is provided in a movable sleeve inside the first rotating hole (45), a second mounting groove (47) is provided at the top of the rotating roller (41) and above the strip groove (44), matching grooves (48) are provided on both sides and at the end of the inner wall of the second mounting groove (47), a connecting device (49) is fixedly installed inside the second mounting groove (47), and a fastening hole (401) is provided at a position near the second mounting groove (47) on the top of the rotating roller (41).

2. An energy-saving ventilation duct device according to claim 1, characterized in that: The number of the first mounting grooves (42), the strip grooves (44) and the second mounting grooves (47) are all eight, and they are distributed in a circular array.

3. An energy-saving ventilation duct device according to claim 2, characterized in that: A ratchet (402) is fixedly mounted at the center of the top and bottom of the rotating drum (41); a bearing seat (403) is fixedly mounted at one end of the ratchet (402); a travel seat (404) is movably sleeved on the outer surface of the bearing seat (403) by means of a bearing connection; sliding seats (405) are fixedly mounted on both sides of the outer surface of the travel seat (404); and the travel seat (404) is movably mounted inside the travel chamber (5).

4. The energy-saving ventilation duct device according to claim 3, characterized in that: The sliding seat (405) cooperates with the limiting sliding rod (7), one end of the sliding seat (405) is connected to the inner wall of the limiting bin (6) via a spring, and the ratchet (402) is in contact and engaged with the clamping seat (8) in the initial state.

5. The energy-saving ventilation duct device according to claim 4, characterized in that: The filtering device (43) comprises a connecting frame (431), a filtering screen (432) being fixedly mounted inside the connecting frame (431), connecting bolts (433) being sleeved on the top of the connecting frame (431) near both sides, the connecting bolts (433) being connected to the first mounting groove (42); the driving device (46) comprises a driving blade (461), a connecting shaft (462) being fixedly mounted on the top and bottom of the driving blade (461), a torsion spring (463) being clamped on the outer surface of the connecting shaft (462), one end of the torsion spring (463) at the bottom of the driving blade (461) being connected to the first rotating hole ( 45) is connected; the connecting device (49) comprises a connecting seat (491), and side slide plates (492) and a matching tail plate (493) are respectively fixedly installed on both sides and the end of the connecting seat (491), and a fastening bolt (494) is sleeved on the top of the matching tail plate (493), and the fastening bolt (494) is matched with the fastening hole (401) at the same time; a bottom plate (495) is fixedly installed at a position near the front end of the bottom of the connecting seat (491), and a second rotating hole (496) is opened at the bottom of the bottom plate (495), and the second rotating hole (496) is connected to one end of the torsion spring (463) at the bottom of the driving fan blade (461).

6. An energy-saving ventilation duct device according to claim 5, characterized in that: The elastic force of the torsion spring (463) in the initial state drives the fan blade (461) to rotate to the unfolded state.

7. An energy-saving ventilation duct device according to claim 6, characterized in that: The dust collection device (11) comprises a dust collection box (111), side connection holes (112) are provided on both sides of the dust collection box (111), a connection pipe (113) is fixedly installed at a position on one side of the dust collection box (111) corresponding to the side connection hole (112), the side air duct (10) is fixedly connected to the side connection hole (112) on one side, one end of the connection pipe (113) is connected to the air supply pipe (3), and a hand-pull dust collection plate (114) is movably installed at the bottom of the dust collection box (111).

8. An energy-saving ventilation duct device according to claim 7, characterized in that: The flow blocking device (12) comprises a power machine (121), a rotating shaft (122) being fixedly mounted on the output end of the power machine (121), a flow blocking plate (123) being fixedly sleeved on the outer surface of the rotating shaft (122), and a flow blocking block (124) being fixedly mounted on one side of the flow blocking plate (123); in an initial state, the flow blocking block (124) blocks the connection between the connecting pipe (113) and the air supply pipe (3), and after the power machine (121) drives the rotating shaft (122) to rotate ninety degrees, the flow blocking plate (123) blocks the inside of the air supply pipe (3).

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